Could I have handled this PC interaction better?

I started up a play by post game on roll20 for a group of friends. A co-worker, and friend of another player, had asked to join in. Let’s call him P1, or Player 1. I said sure, we got the game going after some slow start up.

The party is meeting for the first time in a tavern. They get the adventure hook and agree to work together. P1 is playing a gnome wizard. My wife is playing a human paladin. She thought it would be funny, since her paladin isn’t the brightest of the bunch, to pick up the gnome and get them on the road. P1 responds by wanting to not be picked up. I ask both for a strength roll. P1 loses. So I ask him what his response is to being picked up. His response was to quit and leave our discord server we were using for ooc talk.

While I don’t miss someone who would bail so quickly, I do wonder if I could have done something better. I’d like to learn from this to avoid such a situation in the future. Should I have stopped my wife before she even tried to pick up P1? Was it wrong to let the dice decide who won the conflict of being picked up?